Fixed a 2D problem of not properly (calculating chi2 and fitting 2Ddata) with bounded Q range.
Fixed a 2D problem of not properly (calculating chi2 and fitting 2Ddata) with bounded Q range.

SasView/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,SasView/sasview,lewisodriscoll/sasview